combustion products combustion 9 flueways 7 filtration of flue gases 6 filters of solid particles 6 diesel engines 6 car motors 5 more ... gases 5 simulation and modelling 5 air pollution 5 biomass 4 absorption spectroscopy 3 analysis of gases 3 photometry 3 abstersion of flue gases 3 automation 2 imissions 2 chimneys 2 measurement 2 environment protection 2 reduction 2 internal combustion motors 2 civil engineering 2 technical standards 2 cleaning 2 aerodispersive systems 1 analysis 1 atmosphere (geophysics) 1 biofuels 1 buildings (architecture) 1 less ...